Mesoporous alumina nickel-based catalyst with high activity and high stability for CO2 reforming CH4 reaction and preparation method of mesoporous alumina nickel-based catalyst

A catalyst and mesoporous technology, applied in the field of mesoporous aluminum-nickel-based catalysts and their preparation, can solve problems such as sulfide poisoning, expensive noble metal catalysts, harsh operating conditions, etc., and achieve large pore volume, high catalytic activity and stability , the effect of easy operation

Inactive Publication Date: 2015-04-29
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

One is Ni, Fe, Co-based catalysts. The advantages of noble metal catalysts are high catalytic activity and strong anti-coking performance. The disadvantage is that noble metal catalysts are expensive and susceptible to sulfide poisoning.
Most of the mesoporous catalytic materials reported in the literature use organic substances as templates or use expensive organic salts, and the operating conditions are generally harsh

Method used

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  • Mesoporous alumina nickel-based catalyst with high activity and high stability for CO2 reforming CH4 reaction and preparation method of mesoporous alumina nickel-based catalyst
  • Mesoporous alumina nickel-based catalyst with high activity and high stability for CO2 reforming CH4 reaction and preparation method of mesoporous alumina nickel-based catalyst
  • Mesoporous alumina nickel-based catalyst with high activity and high stability for CO2 reforming CH4 reaction and preparation method of mesoporous alumina nickel-based catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation steps in the present embodiment are as follows:

[0041] a. Add 3.9 g Ni(NO 3 ) 2 .6H 2 O and 37.5 g Al(NO 3 ) 3 .9H 2 O was dissolved in 50 mL of deionized water to obtain a uniformly mixed solution so that the concentration of aluminum ions was 2 mol / L;

[0042] b. Under the condition of 75 ℃, add ammonium carbonate solution with a concentration of 1 mol / L to the above solution drop by drop while stirring, control the titration rate of ammonium carbonate to 0.4 mL / min, and stop immediately after the sol is obtained through the titration reaction Titration, control the pH value of the titrated sol to be 5.0~5.5;

[0043] c. Aging the sol formed by titration at room temperature for 24 hours at a constant temperature, spread it in an open container with a thickness of no more than two centimeters, and dry it at a constant temperature of 100°C for 24 hours;

[0044] d. Calcining the above-mentioned dried gel at 200 °C for 10 h at a heating rate of...

Embodiment 2

[0048] The preparation steps in the present embodiment are as follows:

[0049] a. Add 4.1g Ni(NO 3 ) 2 ·6H 2 O, 0.6g La(NO 3 ) 3 ·nH 2 O and 37.5g Al(NO 3 ) 3 9H 2 O was dissolved in 50mL of deionized water to obtain a uniformly mixed solution so that the concentration of aluminum ions was 2mol / L;

[0050] b. Under the condition of 75 ℃, add ammonium carbonate solution with a concentration of 1mol / L to the above solution drop by drop while stirring, and control the titration rate of ammonium carbonate to about 0.4 mL / min, so that after the titration reaction to obtain the sol Stop the titration immediately, and control the pH value of the titrated sol to be 5.0~5.5;

[0051] c. Aging the sol formed by titration at room temperature for 24 hours at a constant temperature, spread it in an open container with a thickness of no more than two centimeters, and dry it at a constant temperature of 100°C for 24 hours;

[0052] d. Calcining the above-mentioned dried gel at 2...

Embodiment 3

[0055] The preparation steps in the present embodiment are as follows:

[0056] a. Add 4.1g Ni(NO 3 ) 2 ·6H 2 O, 0.6g Ce(NO 3 ) 3 ·6H 2 O and 37.5g Al(NO 3 ) 3 9H 2 O was dissolved in 50mL of deionized water to obtain a uniformly mixed solution so that the concentration of aluminum ions was 2mol / L;

[0057] b. Under the condition of 75 ℃, add ammonium carbonate solution with a concentration of 1mol / L to the above solution dropwise while stirring, and control the titration rate of ammonium carbonate to about 0.4mL / min, so that after the titration reaction to obtain the sol Stop the titration immediately, and control the pH value of the titrated sol to be 5.0~5.5;

[0058] c. Aging the sol formed by titration at room temperature for 24 hours at a constant temperature, spread it in an open container with a thickness of no more than two centimeters, and dry it at a constant temperature at 100°C for 24 hours;

[0059] d. Calcining the above-mentioned dried gel at 200 °C...

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Abstract

The invention mainly relates to a mesoporous alumina nickel-based catalyst for carbon dioxide reforming methane reaction and a preparation method of the mesoporous alumina nickel-based catalyst. The method comprises the following steps: forming sol-gel by controlling the titration rate of ammonium carbonate through partial hydrolysis methods of an inorganic salt and the ammonium carbonate; and then burning at 800 DEG C to prepare the nickel-based catalyst, wherein addition of a template agent and an organic salt is not required. The nickel-based catalyst prepared by the method has super-high activity and stability; and the activity and the stability of lanthanum added as an assistant are the best. The preparation method is simple in process and low in cost; the prepared nickel-based catalyst has the advantages of high specific surface area, narrow pore size distribution and relatively large pore volume; nickel oxides and assistants metal oxides are highly dispersed and have relatively high CO2 reforming CH4 catalytic activity and stability; the raw materials are cheap and easy to get; and the preparation process is easy to control and easy to industrialize.

Description

technical field [0001] The invention discloses a mesoporous aluminum-nickel-based catalyst for carbon dioxide reforming methane reaction and a preparation method thereof, belonging to the technical field of catalyst preparation technology. Background technique [0002] There are usually several methods for methane reforming to synthesis gas: partial oxidation of methane (POM), steam reforming of methane (SRM), and carbon dioxide reforming of methane (DMR). The reforming of methane and carbon dioxide to produce synthesis gas is a strong endothermic reaction, and the reaction equation is as follows: [0003] H in the produced syngas 2 The / CO ratio is about 1. The synthesis gas is an ideal raw material for Fischer-Tropsch synthesis to prepare liquid fuels such as diesel and paraffin, and is also an important raw material for the preparation of methanol and dimethyl ether. The carbon dioxide reforming of methane makes up for the deficiency of the relatively high hydrogen-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/83B01J23/78C01B3/34
Inventor 汪学广张利丁伟中尚兴付邹秀晶
Owner SHANGHAI UNIV
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